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|
#!/bin/sh
### BEGIN INIT INFO
# Provides: dnsmasq
# Required-Start: $network $remote_fs $syslog
# Required-Stop: $network $remote_fs $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Description: DHCP and DNS server
### END INIT INFO
set +e # Don't exit on error status
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/sbin/dnsmasq
NAME=dnsmasq
DESC="DNS forwarder and DHCP server"
# Most configuration options in /etc/default/dnsmasq are deprecated
# but still honoured.
ENABLED=1
if [ -r /etc/default/$NAME ]; then
. /etc/default/$NAME
fi
# Get the system locale, so that messages are in the correct language, and the
# charset for IDN is correct
if [ -r /etc/default/locale ]; then
. /etc/default/locale
export LANG
fi
# /etc/dnsmasq.d/README is a non-conffile installed by the dnsmasq package.
# Should the dnsmasq package be removed, the following test ensures that
# the daemon is no longer started, even if the dnsmasq-base package is
# still in place.
test -e /etc/dnsmasq.d/README || exit 0
test -x $DAEMON || exit 0
# Provide skeleton LSB log functions for backports which don't have LSB functions.
if [ -f /lib/lsb/init-functions ]; then
. /lib/lsb/init-functions
else
log_warning_msg () {
echo "${@}."
}
log_success_msg () {
echo "${@}."
}
log_daemon_msg () {
echo -n "${1}: $2"
}
log_end_msg () {
if [ $1 -eq 0 ]; then
echo "."
elif [ $1 -eq 255 ]; then
/bin/echo -e " (warning)."
else
/bin/echo -e " failed!"
fi
}
fi
# RESOLV_CONF:
# If the resolvconf package is installed then use the resolv conf file
# that it provides as the default. Otherwise use /etc/resolv.conf as
# the default.
#
# If IGNORE_RESOLVCONF is set in /etc/default/dnsmasq or an explicit
# filename is set there then this inhibits the use of the resolvconf-provided
# information.
#
# Note that if the resolvconf package is installed it is not possible to
# override it just by configuration in /etc/dnsmasq.conf, it is necessary
# to set IGNORE_RESOLVCONF=yes in /etc/default/dnsmasq.
if [ ! "$RESOLV_CONF" ] &&
[ "$IGNORE_RESOLVCONF" != "yes" ] &&
[ -x /sbin/resolvconf ]
then
RESOLV_CONF=/var/run/dnsmasq/resolv.conf
fi
for INTERFACE in $DNSMASQ_INTERFACE; do
DNSMASQ_INTERFACES="$DNSMASQ_INTERFACES -i $INTERFACE"
done
for INTERFACE in $DNSMASQ_EXCEPT; do
DNSMASQ_INTERFACES="$DNSMASQ_INTERFACES -I $INTERFACE"
done
if [ ! "$DNSMASQ_USER" ]; then
DNSMASQ_USER="dnsmasq"
fi
# This tells dnsmasq to ignore DNS requests that don't come from a local network.
# It's automatically ignored if --interface --except-interface, --listen-address
# or --auth-server exist in the configuration, so for most installations, it will
# have no effect, but for otherwise-unconfigured installations, it stops dnsmasq
# from being vulnerable to DNS-reflection attacks.
DNSMASQ_OPTS="$DNSMASQ_OPTS --local-service"
start()
{
# Return
# 0 if daemon has been started
# 1 if daemon was already running
# 2 if daemon could not be started
# /var/run may be volatile, so we need to ensure that
# /var/run/dnsmasq exists here as well as in postinst
if [ ! -d /var/run/dnsmasq ]; then
mkdir /var/run/dnsmasq || return 2
chown dnsmasq:nogroup /var/run/dnsmasq || return 2
fi
start-stop-daemon --start --quiet --pidfile /var/run/dnsmasq/$NAME.pid --exec $DAEMON --test > /dev/null || return 1
start-stop-daemon --start --quiet --pidfile /var/run/dnsmasq/$NAME.pid --exec $DAEMON -- \
-x /var/run/dnsmasq/$NAME.pid \
${MAILHOSTNAME:+ -m $MAILHOSTNAME} \
${MAILTARGET:+ -t $MAILTARGET} \
${DNSMASQ_USER:+ -u $DNSMASQ_USER} \
${DNSMASQ_INTERFACES:+ $DNSMASQ_INTERFACES} \
${DHCP_LEASE:+ -l $DHCP_LEASE} \
${DOMAIN_SUFFIX:+ -s $DOMAIN_SUFFIX} \
${RESOLV_CONF:+ -r $RESOLV_CONF} \
${CACHESIZE:+ -c $CACHESIZE} \
${CONFIG_DIR:+ -7 $CONFIG_DIR} \
${DNSMASQ_OPTS:+ $DNSMASQ_OPTS} \
|| return 2
}
start_resolvconf()
{
# If interface "lo" is explicitly disabled in /etc/default/dnsmasq
# Then dnsmasq won't be providing local DNS, so don't add it to
# the resolvconf server set.
for interface in $DNSMASQ_EXCEPT
do
[ $interface = lo ] && return
done
if [ -x /sbin/resolvconf ] ; then
echo "nameserver 127.0.0.1" | /sbin/resolvconf -a lo.$NAME
fi
return 0
}
stop()
{
# Return
# 0 if daemon has been stopped
# 1 if daemon was already stopped
# 2 if daemon could not be stopped
# other if a failure occurred
start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile /var/run/dnsmasq/$NAME.pid --name $NAME
}
stop_resolvconf()
{
if [ -x /sbin/resolvconf ] ; then
/sbin/resolvconf -d lo.$NAME
fi
return 0
}
status()
{
# Return
# 0 if daemon is running
# 1 if daemon is dead and pid file exists
# 3 if daemon is not running
# 4 if daemon status is unknown
start-stop-daemon --start --quiet --pidfile /var/run/dnsmasq/$NAME.pid --exec $DAEMON --test > /dev/null
case "$?" in
0) [ -e "/var/run/dnsmasq/$NAME.pid" ] && return 1 ; return 3 ;;
1) return 0 ;;
*) return 4 ;;
esac
}
case "$1" in
start)
test "$ENABLED" != "0" || exit 0
log_daemon_msg "Starting $DESC" "$NAME"
start
case "$?" in
0)
log_end_msg 0
start_resolvconf
exit 0
;;
1)
log_success_msg "(already running)"
exit 0
;;
*)
log_end_msg 1
exit 1
;;
esac
;;
stop)
stop_resolvconf
if [ "$ENABLED" != "0" ]; then
log_daemon_msg "Stopping $DESC" "$NAME"
fi
stop
RETVAL="$?"
if [ "$ENABLED" = "0" ]; then
case "$RETVAL" in
0) log_daemon_msg "Stopping $DESC" "$NAME"; log_end_msg 0 ;;
esac
exit 0
fi
case "$RETVAL" in
0) log_end_msg 0 ; exit 0 ;;
1) log_warning_msg "(not running)" ; exit 0 ;;
*) log_end_msg 1; exit 1 ;;
esac
;;
restart|force-reload)
test "$ENABLED" != "0" || exit 1
$DAEMON --test ${CONFIG_DIR:+ -7 $CONFIG_DIR} ${DNSMASQ_OPTS:+ $DNSMASQ_OPTS} >/dev/null 2>&1
if [ $? -ne 0 ]; then
NAME="configuration syntax check"
RETVAL="2"
else
stop_resolvconf
stop
RETVAL="$?"
fi
log_daemon_msg "Restarting $DESC" "$NAME"
case "$RETVAL" in
0|1)
sleep 2
start
case "$?" in
0)
log_end_msg 0
start_resolvconf
exit 0
;;
*)
log_end_msg 1
exit 1
;;
esac
;;
*)
log_end_msg 1
exit 1
;;
esac
;;
status)
log_daemon_msg "Checking $DESC" "$NAME"
status
case "$?" in
0) log_success_msg "(running)" ; exit 0 ;;
1) log_success_msg "(dead, pid file exists)" ; exit 1 ;;
3) log_success_msg "(not running)" ; exit 3 ;;
*) log_success_msg "(unknown)" ; exit 4 ;;
esac
;;
dump-stats)
kill -s USR1 `cat /var/run/dnsmasq/$NAME.pid`
;;
systemd-start-resolvconf)
start_resolvconf
;;
systemd-stop-resolvconf)
stop_resolvconf
;;
systemd-exec)
# /var/run may be volatile, so we need to ensure that
# /var/run/dnsmasq exists here as well as in postinst
if [ ! -d /var/run/dnsmasq ]; then
mkdir /var/run/dnsmasq || return 2
chown dnsmasq:nogroup /var/run/dnsmasq || return 2
fi
# Enable DBus by default because we use DBus activation with systemd.
exec $DAEMON --keep-in-foreground --enable-dbus \
-x /var/run/dnsmasq/$NAME.pid \
${MAILHOSTNAME:+ -m $MAILHOSTNAME} \
${MAILTARGET:+ -t $MAILTARGET} \
${DNSMASQ_USER:+ -u $DNSMASQ_USER} \
${DNSMASQ_INTERFACES:+ $DNSMASQ_INTERFACES} \
${DHCP_LEASE:+ -l $DHCP_LEASE} \
${DOMAIN_SUFFIX:+ -s $DOMAIN_SUFFIX} \
${RESOLV_CONF:+ -r $RESOLV_CONF} \
${CACHESIZE:+ -c $CACHESIZE} \
${CONFIG_DIR:+ -7 $CONFIG_DIR} \
${DNSMASQ_OPTS:+ $DNSMASQ_OPTS}
;;
*)
echo "Usage: /etc/init.d/$NAME {start|stop|restart|force-reload|dump-stats|status}" >&2
exit 3
;;
esac
exit 0
|